Merge tag 'timers-vdso-2024-11-18' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull vdso data page handling updates from Thomas Gleixner:
 "First steps of consolidating the VDSO data page handling.

  The VDSO data page handling is architecture specific for historical
  reasons, but there is no real technical reason to do so.

  Aside of that VDSO data has become a dump ground for various
  mechanisms and fail to provide a clear separation of the
  functionalities.

  Clean this up by:

   - consolidating the VDSO page data by getting rid of architecture
     specific warts especially in x86 and PowerPC.

   - removing the last includes of header files which are pulling in
     other headers outside of the VDSO namespace.

   - seperating timekeeping and other VDSO data accordingly.

  Further consolidation of the VDSO page handling is done in subsequent
  changes scheduled for the next merge window.

  This also lays the ground for expanding the VDSO time getters for
  independent PTP clocks in a generic way without making every
  architecture add support seperately"

* tag 'timers-vdso-2024-11-18' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (42 commits)
  x86/vdso: Add missing brackets in switch case
  vdso: Rename struct arch_vdso_data to arch_vdso_time_data
  powerpc: Split systemcfg struct definitions out from vdso
  powerpc: Split systemcfg data out of vdso data page
  powerpc: Add kconfig option for the systemcfg page
  powerpc/pseries/lparcfg: Use num_possible_cpus() for potential processors
  powerpc/pseries/lparcfg: Fix printing of system_active_processors
  powerpc/procfs: Propagate error of remap_pfn_range()
  powerpc/vdso: Remove offset comment from 32bit vdso_arch_data
  x86/vdso: Split virtual clock pages into dedicated mapping
  x86/vdso: Delete vvar.h
  x86/vdso: Access vdso data without vvar.h
  x86/vdso: Move the rng offset to vsyscall.h
  x86/vdso: Access rng vdso data without vvar.h
  x86/vdso: Access timens vdso data without vvar.h
  x86/vdso: Allocate vvar page from C code
  x86/vdso: Access rng data from kernel without vvar
  x86/vdso: Place vdso_data at beginning of vvar page
  x86/vdso: Use __arch_get_vdso_data() to access vdso data
  x86/mm/mmap: Remove arch_vma_name()
  ...

13 files changed, 24 insertions, 39 deletions

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index a45259d4c0a5..c64b2987d108 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -95,7 +95,7 @@ config S390
 	select ARCH_HAS_STRICT_MODULE_RWX
 	select ARCH_HAS_SYSCALL_WRAPPER
 	select ARCH_HAS_UBSAN
-	select ARCH_HAS_VDSO_DATA
+	select ARCH_HAS_VDSO_TIME_DATA
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select ARCH_INLINE_READ_LOCK
 	select ARCH_INLINE_READ_LOCK_BH
diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h
index 4405084d55a4..d703e736bddc 100644
--- a/arch/s390/include/asm/page.h
+++ b/arch/s390/include/asm/page.h
@@ -12,14 +12,8 @@
 #include <asm/types.h>
 #include <asm/asm.h>
 
-#define _PAGE_SHIFT	CONFIG_PAGE_SHIFT
-#define _PAGE_SIZE	(_AC(1, UL) << _PAGE_SHIFT)
-#define _PAGE_MASK	(~(_PAGE_SIZE - 1))
-
-/* PAGE_SHIFT determines the page size */
-#define PAGE_SHIFT	_PAGE_SHIFT
-#define PAGE_SIZE	_PAGE_SIZE
-#define PAGE_MASK	_PAGE_MASK
+#include <vdso/page.h>
+
 #define PAGE_DEFAULT_ACC	_AC(0, UL)
 /* storage-protection override */
 #define PAGE_SPO_ACC		9
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 0ffbaf741955..8b67036edb69 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -338,7 +338,7 @@ static inline int is_module_addr(void *addr)
 #define _REGION2_INDEX	(0x7ffUL << _REGION2_SHIFT)
 #define _REGION3_INDEX	(0x7ffUL << _REGION3_SHIFT)
 #define _SEGMENT_INDEX	(0x7ffUL << _SEGMENT_SHIFT)
-#define _PAGE_INDEX	(0xffUL  << _PAGE_SHIFT)
+#define _PAGE_INDEX	(0xffUL  << PAGE_SHIFT)
 
 #define _REGION1_SIZE	(1UL << _REGION1_SHIFT)
 #define _REGION2_SIZE	(1UL << _REGION2_SHIFT)
diff --git a/arch/s390/include/asm/vdso.h b/arch/s390/include/asm/vdso.h
index 91061f0279be..92c73e4d97a9 100644
--- a/arch/s390/include/asm/vdso.h
+++ b/arch/s390/include/asm/vdso.h
@@ -12,9 +12,6 @@ int vdso_getcpu_init(void);
 
 #endif /* __ASSEMBLY__ */
 
-/* Default link address for the vDSO */
-#define VDSO_LBASE	0
-
 #define __VVAR_PAGES	2
 
 #define VDSO_VERSION_STRING	LINUX_2.6.29
diff --git a/arch/s390/include/asm/vdso/data.h b/arch/s390/include/asm/vdso/data.h
deleted file mode 100644
index 0e2b40ef69b0..000000000000
--- a/arch/s390/include/asm/vdso/data.h
+++ /dev/null
@@ -1,12 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __S390_ASM_VDSO_DATA_H
-#define __S390_ASM_VDSO_DATA_H
-
-#include <linux/types.h>
-
-struct arch_vdso_data {
-	__s64 tod_steering_delta;
-	__u64 tod_steering_end;
-};
-
-#endif /* __S390_ASM_VDSO_DATA_H */
diff --git a/arch/s390/include/asm/vdso/time_data.h b/arch/s390/include/asm/vdso/time_data.h
new file mode 100644
index 000000000000..8a08752422e6
--- /dev/null
+++ b/arch/s390/include/asm/vdso/time_data.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __S390_ASM_VDSO_TIME_DATA_H
+#define __S390_ASM_VDSO_TIME_DATA_H
+
+#include <linux/types.h>
+
+struct arch_vdso_time_data {
+	__s64 tod_steering_delta;
+	__u64 tod_steering_end;
+};
+
+#endif /* __S390_ASM_VDSO_TIME_DATA_H */
diff --git a/arch/s390/include/asm/vdso/vsyscall.h b/arch/s390/include/asm/vdso/vsyscall.h
index 3c5d5e47814e..3eb576ecd3bd 100644
--- a/arch/s390/include/asm/vdso/vsyscall.h
+++ b/arch/s390/include/asm/vdso/vsyscall.h
@@ -7,7 +7,6 @@
 #ifndef __ASSEMBLY__
 
 #include <linux/hrtimer.h>
-#include <linux/timekeeper_internal.h>
 #include <vdso/datapage.h>
 #include <asm/vdso.h>
 
@@ -17,10 +16,6 @@ enum vvar_pages {
 	VVAR_NR_PAGES
 };
 
-/*
- * Update the vDSO data page to keep in sync with kernel timekeeping.
- */
-
 static __always_inline struct vdso_data *__s390_get_k_vdso_data(void)
 {
 	return vdso_data;
diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index cd02ed7931b7..30fd10a72c5d 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -36,7 +36,6 @@
 #include <linux/profile.h>
 #include <linux/timex.h>
 #include <linux/notifier.h>
-#include <linux/timekeeper_internal.h>
 #include <linux/clockchips.h>
 #include <linux/gfp.h>
 #include <linux/kprobes.h>
diff --git a/arch/s390/kernel/vdso32/vdso32.lds.S b/arch/s390/kernel/vdso32/vdso32.lds.S
index 65b9513a5a0e..c916c4f73f76 100644
--- a/arch/s390/kernel/vdso32/vdso32.lds.S
+++ b/arch/s390/kernel/vdso32/vdso32.lds.S
@@ -16,7 +16,7 @@ SECTIONS
 #ifdef CONFIG_TIME_NS
 	PROVIDE(_timens_data = _vdso_data + PAGE_SIZE);
 #endif
-	. = VDSO_LBASE + SIZEOF_HEADERS;
+	. = SIZEOF_HEADERS;
 
 	.hash		: { *(.hash) }			:text
 	.gnu.hash	: { *(.gnu.hash) }
diff --git a/arch/s390/kernel/vdso64/vdso64.lds.S b/arch/s390/kernel/vdso64/vdso64.lds.S
index 753040a4b5ab..ec42b7d9cb53 100644
--- a/arch/s390/kernel/vdso64/vdso64.lds.S
+++ b/arch/s390/kernel/vdso64/vdso64.lds.S
@@ -18,7 +18,7 @@ SECTIONS
 #ifdef CONFIG_TIME_NS
 	PROVIDE(_timens_data = _vdso_data + PAGE_SIZE);
 #endif
-	. = VDSO_LBASE + SIZEOF_HEADERS;
+	. = SIZEOF_HEADERS;
 
 	.hash		: { *(.hash) }			:text
 	.gnu.hash	: { *(.gnu.hash) }
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index 94cb2e092075..646326fa0fad 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -128,7 +128,7 @@ static void dump_pagetable(unsigned long asce, unsigned long address)
 			goto out;
 		table = __va(entry & _SEGMENT_ENTRY_ORIGIN);
 	}
-	table += (address & _PAGE_INDEX) >> _PAGE_SHIFT;
+	table += (address & _PAGE_INDEX) >> PAGE_SHIFT;
 	if (get_kernel_nofault(entry, table))
 		goto bad;
 	pr_cont("P:%016lx ", entry);
diff --git a/arch/s390/mm/gmap.c b/arch/s390/mm/gmap.c
index 329682655af2..643e47bfaddc 100644
--- a/arch/s390/mm/gmap.c
+++ b/arch/s390/mm/gmap.c
@@ -900,7 +900,7 @@ static inline unsigned long *gmap_table_walk(struct gmap *gmap,
 		if (*table & _REGION_ENTRY_INVALID)
 			return NULL;
 		table = __va(*table & _SEGMENT_ENTRY_ORIGIN);
-		table += (gaddr & _PAGE_INDEX) >> _PAGE_SHIFT;
+		table += (gaddr & _PAGE_INDEX) >> PAGE_SHIFT;
 	}
 	return table;
 }
@@ -1366,7 +1366,7 @@ static void gmap_unshadow_page(struct gmap *sg, unsigned long raddr)
 	table = gmap_table_walk(sg, raddr, 0); /* get page table pointer */
 	if (!table || *table & _PAGE_INVALID)
 		return;
-	gmap_call_notifier(sg, raddr, raddr + _PAGE_SIZE - 1);
+	gmap_call_notifier(sg, raddr, raddr + PAGE_SIZE - 1);
 	ptep_unshadow_pte(sg->mm, raddr, (pte_t *) table);
 }
 
@@ -1384,7 +1384,7 @@ static void __gmap_unshadow_pgt(struct gmap *sg, unsigned long raddr,
 	int i;
 
 	BUG_ON(!gmap_is_shadow(sg));
-	for (i = 0; i < _PAGE_ENTRIES; i++, raddr += _PAGE_SIZE)
+	for (i = 0; i < _PAGE_ENTRIES; i++, raddr += PAGE_SIZE)
 		pgt[i] = _PAGE_INVALID;
 }
 
diff --git a/arch/s390/mm/pgalloc.c b/arch/s390/mm/pgalloc.c
index f691e0fb66a2..58696a0c4e4a 100644
--- a/arch/s390/mm/pgalloc.c
+++ b/arch/s390/mm/pgalloc.c
@@ -278,7 +278,7 @@ static inline unsigned long base_##NAME##_addr_end(unsigned long addr,	\
 	return (next - 1) < (end - 1) ? next : end;			\
 }
 
-BASE_ADDR_END_FUNC(page,    _PAGE_SIZE)
+BASE_ADDR_END_FUNC(page,    PAGE_SIZE)
 BASE_ADDR_END_FUNC(segment, _SEGMENT_SIZE)
 BASE_ADDR_END_FUNC(region3, _REGION3_SIZE)
 BASE_ADDR_END_FUNC(region2, _REGION2_SIZE)
@@ -302,7 +302,7 @@ static int base_page_walk(unsigned long *origin, unsigned long addr,
 	if (!alloc)
 		return 0;
 	pte = origin;
-	pte += (addr & _PAGE_INDEX) >> _PAGE_SHIFT;
+	pte += (addr & _PAGE_INDEX) >> PAGE_SHIFT;
 	do {
 		next = base_page_addr_end(addr, end);
 		*pte = base_lra(addr);